<div>
    <p class="dxy-float-left">左浮动</p>
    <p>（左浮动后面的内容）</p>
    <p class="dxy-float-right">右浮动</p>
    <p>（右浮动后面的内容）</p>
</div>
<div class="dxy-clear-fix">
    <p class="dxy-float-left">左浮动</p>
</div>
<p>清除浮动了！</p>
